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Flashcards in Weather Test -Ms. Adams Deck (33):
1

What are clouds?

Visible mass particles made of water and ice

2

What is humidity?

The amount of moisture in the air

3

What is our air made up of and what percentage?

Nitrogen 78%
Oxygen 21%
Other gases 1%

4

Air moves from areas of __________ pressure to areas of __________ pressure.

High to low

5

What is air pressure?

The weight of air at a particular location

6

What is wind created by?

Differences in air pressure

7

The high pressure belts at 30 degrees north or south latitudes are called what?

Horse latitudes

8

Global winds in the US that blow from the west are called?

Westerlies

9

Describe how local wind blow

From any direction

10

Pressure belts are caused by?

Uneven heating of the earth

11

The doldrums are an area of very little wind due to?

Warm air rising (low pressure)

12

What is air doing in a n area of high pressure?

Air is cooling and sinking

13

What are Narrow belts of high speed, high altitude winds that don't follow a regular pattern?

Jet stream

14

What is a thermometer used for?

Measure air temperature

15

What is an anemometer used for?

Measures wind speed

16

What is a rain gauge used for?

Measures amount of precipitation

17

What is a sling psychometer used for?

Measures humidity

18

What is a barometer used for?

Measures pressure

19

What is a weather vane used for?

Wind direction

20

What is a body of air with a similar temperature and moisture level?

Air mass

21

What two terms are used to describe the temperature of an air mass?

Polar and tropical

22

What are two terms to describe the moisture content of an air mass?

Continental and maritime

23

What is a boundary between two air masses called?

A front

24

Why is it drier in Las Vegas than San Francis?

The air in Las Vegas comes from over land and the air in San Francisco comes from over water

25

Describe a warm front.

Warm air moves in and is lifted above the cooler air

26

Describe a cold front

Very dense cold air moving forward

27

Describe an occluded front

A fast cold front catches up with a warm front

28

Describe a stationary front

Warm and cold front run into each other and don't move

29

List the layers of the atmosphere in order and one important fact about it.

Exosphere - blends to space

Thermosphere - space ships orbit here

Mesosphere - meteors burn up in the layer

Stratosphere - ozone layer

Troposphere - all weather

30

Would there be more storms at a low pressure or high pressure zone? Why?

Low

Air is rising, condensing, forming clouds and rain

31

Why don't global winds blow in straight lines?

Coriolis effect

Earths rotation

32

How does air pressure change as altitude increases?

It decreases

33

A scientist who studies weather is called a

Meteorologist